neutron proton ratio

Based on the isospin-and momentum-dependent transport model IBUU04,the transverse momentum distri- butions of the free neutron-proton ratio in the ~(132)Sn+~(124)Sn reaction system at mid-central collisions with beam energies of 400/AMeV,600/AMeV and 800/AMeV are studied by using two different symmetry energies.

基于同位旋和动量依赖的强子输运模型IBUU04,采用两种具有不同密度依赖的对称能研究了~(132)Sn+~(124)Sn反应系统在400MeV/A,600MeV/A,800MeV/A三种不同碰撞能量下中快度发射核子中-质比随横动量的变化关系。